The intacs procedure is indicated for the correction of mild nearsightedness.
Intracorneal rings are plastic inserts placed “in” the cornea. The rings flatten the central cornea to correct low levels of nearsightedness (myopia). Unlike other refractive surgery procedures, intracorneal rings can be removed. When the inserts are removed the cornea returns to its preoperative shape and is once again nearsighted. The procedure is performed on an outpatient basis using drops for an anesthetic. It is a quick procedure and takes less than half an hour. Research is being done on intracorneal rings to correct farsightedness and astigmatism as well as use in patients with Keratoconus.
Complications with intracorneal rings are rare, but include undercorrection, overcorrection, induced astigmatism, infection, glare, haloes and extrusion of the insert. Minimal scarring may also occur in the area of the rings.

Advantages of this procedure are:
1.) No cuts in the visual axis
2.) Plastics rings may be removed
3.) May be a viable treatment for Keratoconus
Disadvantages of this procedure are:
1.) Only treats mild (1-3 units) myopia, with no astigmatism
2.) Longer surgical time than laser procedures
3.) Slightly more post-op pain than laser procedures
4.) Very limited levels of treatment of Nearsightedness and no treatment for farsightedness or astigmatism, at present